.bdhuse{
    width: 600px;
    height: 400px;
    overflow: hidden;
    position: relative;
    border-radius: 20px;

}

.mid{
    position: absolute;
    width: 2400px;
    height: 400px;
    transition: 1s;
}

.pic1{
    width: 600px;
    height: 400px;
    float: left;
    background: url(../Image/1.jpg);
}

.pic2{
    width: 600px;
    height: 400px;
    float: left;
    background: url(../Image/2.jpg);
}

.pic3{
    width: 600px;
    height: 400px;
    float: left;
    background: url(../Image/3.jpg);
}

.pic4{
    width: 600px;
    height: 400px;
    float: left;
    background: url(../Image/4.jpg);
}

.spot_block{
    bottom: 0px;
    right: 0px;
    position: absolute;
}

.left::before{
    cursor: pointer;
    content:"<";
    display:block;
    width:30px;
    height:60px;
    border-radius: 0 20px 20px 0;
    background:rgba(0,0,0,.3);
    position:absolute;
    top:40%;
    left:0px;
    text-align:center;
    line-height:60px;
    font-size:30px;
    color:#fff;
    
}

.right::before{
    cursor: pointer;
    content:">";
    display:block;
    width:30px;
    height:60px;
    border-radius: 20px 0px 0px 20px;
    background:rgba(0,0,0,.3);
    position:absolute;
    top:40%;
    right:-1px;
    text-align:center;
    line-height:60px;
    font-size:30px;
    color:#fff;
}
